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Test No. 5: Only One Headlight Does Not Operate

  1. Check bulb for headlight which does not operate. If bulb is okay, go to next step. If bulb is defective, replace bulb and recheck headlight operation.
  2. Check H-LP LH fuse (10-amp) for driver's side headlight or H-LP RH fuse (10-amp) for passenger's side headlight which does not operate. Fuses are located in fuse/relay box at driver's side front corner of engine compartment. See Figure. If fuse is okay, go to next step. If fuse is defective, repair short in wiring for appropriate fuse. See WIRING DIAGRAMS in HEADLIGHT SYSTEMS article or DAYTIME RUNNING LIGHTS article. Passenger's side Junction Block (J/B) Electronic Control Unit (ECU) is located at passenger's side of instrument panel. See Figure.
  3. Check wiring harness and electrical connectors for headlight which does not operate. See WIRING DIAGRAMS in HEADLIGHT SYSTEMS article or DAYTIME RUNNING LIGHTS article. Passenger's side (J/B) Electronic Control Unit (ECU) is located at passenger's side of instrument panel. See Figure. Repair wiring harness or electrical connector as necessary.
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